JB B2-3 3/16" SAE Gasket

The JB B2-3 3/16" SAE Copper Flare Gasket is a precision-engineered sealing solution designed for high-pressure HVACR applications. Manufactured in the USA from high-grade soft-annealed copper, these gaskets are essential for creating a reliable 45-degree flare connection between brass-to-brass or brass-to-steel components. The JB B2-3 is specifically sized for 3/16" OD tubing and conforms to SAE J513 standards, ensuring full compatibility with standard refrigeration fittings. By acting as a sacrificial sealing element, the gasket deforms under torque to fill micro-imperfections in the flare face, effectively stopping refrigerant leaks in A2L systems and high-vacuum environments. Engineered for durability, the 3/16" copper gasket handles vibration and thermal expansion without compromising joint integrity. For professional results, technicians should apply a compatible lubricant to the flare face and tighten the assembly 2-1/2 turns past hand-tight to ensure a permanent, leak-free HVAC brass fitting seal.

• Metal-to-Metal Sealing: High-purity soft copper construction provides a positive seal that resists "weeping" at the joint.
• Extreme Pressure Rating: Capable of handling vacuum pressures up to 5,000 psi depending on system conditions and material compatibility.
• Standardized Fit: Fully compliant with SAE J513 and ACR tube fitting specifications for 3/16" flared connections.
• Corrosion Resistance: Forged from premium materials to withstand moisture and harsh refrigerant environments in marine or industrial service.
• Leak Prevention: Ideal for field repairs where existing flares may have slight scoring or imperfections that prevent a dry seal.

Can these gaskets be used on stainless steel flare fittings?
Yes, the JB B2-3 is designed for brass-to-brass and brass-to-steel connections, providing a soft interface that prevents leaks on harder metal surfaces.

Are these gaskets compatible with R-454B and other A2L refrigerants?
These copper flare gaskets are A2L compatible and are recommended for modern high-pressure refrigerant systems where seal integrity is critical.

How many gaskets are included in a standard pack?
The JB B2-3 typically comes in a 5-count package, providing enough inventory for multiple field service connections.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.